portable_endian.h

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#ifndef PORTABLE_ENDIAN_H__
#define PORTABLE_ENDIAN_H__
 
#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
 
# define __WINDOWS__
 
#endif
 
#if defined(__linux__) || defined(__CYGWIN__)
 
# include <endian.h>
 
#elif defined(__APPLE__)
 
# include <libkern/OSByteOrder.h>
 
# define htobe16 OSSwapHostToBigInt16
# define htole16 OSSwapHostToLittleInt16
# define be16toh OSSwapBigToHostInt16
# define le16toh OSSwapLittleToHostInt16
# define htobe32 OSSwapHostToBigInt32
# define htole32 OSSwapHostToLittleInt32
# define be32toh OSSwapBigToHostInt32
# define le32toh OSSwapLittleToHostInt32
# define htobe64 OSSwapHostToBigInt64
# define htole64 OSSwapHostToLittleInt64
# define be64toh OSSwapBigToHostInt64
# define le64toh OSSwapLittleToHostInt64
 
# define __BYTE_ORDER BYTE_ORDER
# define __BIG_ENDIAN BIG_ENDIAN
# define __LITTLE_ENDIAN LITTLE_ENDIAN
# define __PDP_ENDIAN PDP_ENDIAN
 
#elif defined(__OpenBSD__)
 
# include <sys/endian.h>
 
#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
 
# include <sys/endian.h>
 
# define be16toh betoh16
# define le16toh letoh16
 
# define be32toh betoh32
# define le32toh letoh32
 
# define be64toh betoh64
# define le64toh letoh64
 
#elif defined(__WINDOWS__)
 
# include <winsock2.h>
# include <sys/param.h>
 
# if BYTE_ORDER == LITTLE_ENDIAN
 
# define htobe16 htons
# define htole16(x) (x)
# define be16toh ntohs
# define le16toh(x) (x)
# define htobe32 htonl
# define htole32(x) (x)
# define be32toh ntohl
# define le32toh(x) (x)
# define htobe64(x) __builtin_bswap64(x)
# define htole64(x) (x)
# define be64toh(x) __builtin_bswap64(x)
# define le64toh(x) (x)
 
# elif BYTE_ORDER == BIG_ENDIAN
 
/* that would be xbox 360 */
# define htobe16(x) (x)
# define htole16(x) __builtin_bswap16(x)
# define be16toh(x) (x)
# define le16toh(x) __builtin_bswap16(x)
# define htobe32(x) (x)
# define htole32(x) __builtin_bswap32(x)
# define be32toh(x) (x)
# define le32toh(x) __builtin_bswap32(x)
# define htobe64(x) (x)
# define htole64(x) __builtin_bswap64(x)
# define be64toh(x) (x)
# define le64toh(x) __builtin_bswap64(x)
 
# else
 
# error byte order not supported
 
# endif
 
# define __BYTE_ORDER BYTE_ORDER
# define __BIG_ENDIAN BIG_ENDIAN
# define __LITTLE_ENDIAN LITTLE_ENDIAN
# define __PDP_ENDIAN PDP_ENDIAN
 
#else
 
# error platform not supported
 
#endif
 
#endif